[ft] sub-pixel-hinting of ft 2.2.1 and ft 2.1.10 differs

[Mike FABIAN]

I wonder why the results for sub-pixel-hinting differ between 
Freetype 2.1.10 and Freetype 2.2.1.20061027 (CVS from 2006-10-27).

The byte code interpreter is compiled in in both versions
of freetype.

Here are two screen shots:

http://lisa.goe.net/~mfabian/freetype2-luxi-mono-sub-pixel-hinting-problem/luxi-mono-sub-pixel-hinting-ft-2.1.10.png
http://lisa.goe.net/~mfabian/freetype2-luxi-mono-sub-pixel-hinting-problem/luxi-mono-sub-pixel-hinting-ft-2.2.1.20061027.png

(Luxi Mono is just an arbitrary example, it seems to happen with all
fonts).

In the ft-2.1.10 screen shot, the vertical lines are solid black. In
the ft-2.2.1.20061027 screen shot, all the vertical lines have light
blue shadow at the right side.

This is easy to see when enlarging with "xmag", but I can see that
easily already without enlarging while reading text with
sub-pixel-hinting rendered by ft-2.2.1.20061027. Looks strange to me.

Is that a bug or is this light blue shadow there on purpose?

-- 
Mike FABIAN   <address@hidden>   http://www.suse.de/~mfabian
睡眠不足はいい仕事の敵だ。